From 04c972c1d0937e7e0f943794a96ff07583a998e4 Mon Sep 17 00:00:00 2001
From: Nicolas Giard <github@ngpixel.com>
Date: Sat, 18 Aug 2018 02:04:31 -0400
Subject: [PATCH] feat: installer syscheck + prompt (wip)

---
 dev/installer/main.go     | 56 ++++++++++++++++++++++++++++++++++++---
 dev/installer/syscheck.go | 54 +++++++++++++++++++++++++++++++++++++
 2 files changed, 106 insertions(+), 4 deletions(-)
 create mode 100644 dev/installer/syscheck.go

diff --git a/dev/installer/main.go b/dev/installer/main.go
index f0cfac23..221d4555 100644
--- a/dev/installer/main.go
+++ b/dev/installer/main.go
@@ -19,29 +19,75 @@ var logo = `
                    |__/
 `
 
+var finish = `
+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
+|                                                   |
+|    Open http://localhost:3000/ in your browser    |
+|    to complete the installation!                  |
+|                                                   |
+<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+`
+
 func main() {
 	fmt.Println(chalk.Yellow.Color(logo))
 	fmt.Println(chalk.Bold.TextStyle("Installer for Wiki.js 2.x"))
-	fmt.Printf("for %s-%s\n\n", runtime.GOOS, runtime.GOARCH)
+	fmt.Printf("%s-%s\n\n", runtime.GOOS, runtime.GOARCH)
+
+	// Check system requirements
+
+	fmt.Println(chalk.Bold.TextStyle("Verifying system requirements..."))
+	CheckNodeJs()
+	CheckRAM()
+	fmt.Println(chalk.Bold.TextStyle("\nSetup"))
 
 	// Prompt for build to install
 
-	prompt := promptui.Select{
+	promptBuild := promptui.Select{
 		Label: "Select Build to install",
 		Items: []string{"Stable", "Dev"},
+		Templates: &promptui.SelectTemplates{
+			Help:     " ",
+			Selected: chalk.Green.Color("✔") + " Build: {{ . }}",
+		},
 	}
 
-	_, result, err := prompt.Run()
+	_, _, err := promptBuild.Run()
 
 	if err != nil {
 		fmt.Printf("Prompt failed %v\n", err)
 		return
 	}
 
-	fmt.Printf("You choose %q\n", result)
+	// Choose database driver
+
+	promptDB := promptui.Select{
+		Label: "Select database driver",
+		Items: []string{"MariaDB", "MySQL", "MS SQL Server", "PostgreSQL", "SQLite"},
+		Templates: &promptui.SelectTemplates{
+			Help:     " ",
+			Selected: chalk.Green.Color("✔") + " Database Driver: {{ . }}",
+		},
+		Size: 10,
+	}
+
+	_, _, err = promptDB.Run()
+
+	// Port
+
+	promptPort := promptui.Prompt{
+		Label:   "Port",
+		Default: "3000",
+		Templates: &promptui.PromptTemplates{
+			Success: chalk.Green.Color("✔") + " Port: {{ . }}",
+		},
+	}
+
+	_, err = promptPort.Run()
 
 	// Download archives...
 
+	fmt.Println(chalk.Bold.TextStyle("\nDownloading packages..."))
+
 	uiprogress.Start()
 	bar := uiprogress.AddBar(100)
 
@@ -51,4 +97,6 @@ func main() {
 	for bar.Incr() {
 		time.Sleep(time.Millisecond * 20)
 	}
+
+	fmt.Println("\n" + chalk.Yellow.Color(finish))
 }
diff --git a/dev/installer/syscheck.go b/dev/installer/syscheck.go
new file mode 100644
index 00000000..9b9f3b4b
--- /dev/null
+++ b/dev/installer/syscheck.go
@@ -0,0 +1,54 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+
+	"github.com/blang/semver"
+	"github.com/pbnjay/memory"
+	"github.com/ttacon/chalk"
+)
+
+const nodejsSemverRange = ">=8.11.3 <10.0.0"
+const ramMin = 768
+
+// CheckNodeJs checks if Node.js is installed and has minimal supported version
+func CheckNodeJs() bool {
+	cmd := exec.Command("node", "-v")
+	cmdOutput, err := cmd.CombinedOutput()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	validRange := semver.MustParseRange(nodejsSemverRange)
+	nodeVersion, err := semver.ParseTolerant(string(cmdOutput[:]))
+	if !validRange(nodeVersion) {
+		fmt.Printf(chalk.Red.Color("Error: Installed Node.js version is not supported! %s"), nodejsSemverRange)
+		os.Exit(1)
+	}
+
+	fmt.Printf(chalk.Green.Color("✔")+" Node.js %s: OK\n", nodeVersion.String())
+
+	return true
+}
+
+// CheckRAM checks if system total RAM meets requirements
+func CheckRAM() bool {
+	var totalRAM = memory.TotalMemory() / 1024 / 1024
+	if totalRAM < ramMin {
+		fmt.Printf(chalk.Red.Color("Error: System does not meet RAM requirements. %s MB minimum."), ramMin)
+		os.Exit(1)
+	}
+
+	fmt.Printf(chalk.Green.Color("✔")+" Total System RAM %d MB: OK\n", totalRAM)
+
+	return true
+}
+
+// CheckNetworkAccess checks if download server can be reached
+func CheckNetworkAccess() bool {
+	// TODO
+	return true
+}